Yu Youren (1879- 1964), a veteran of the Kuomintang, is good at calligraphy, especially cursive, and many people ask him for words. One day, someone specially prepared a banquet and asked him to write it. After dinner, he brought paper and pens. Yu Youren waved his hair as drunk as a fiddler, leaving a line saying "Don't pee anywhere".

The next day, the man took out this line and asked Yu Youren. Yu Youren knew that he had lost his pen after drinking, apologized repeatedly, pondered for a long time, and seemed to gain something. So he asked someone to take scissors, cut a line into pieces and rearrange it, saying, "Look, isn't this a good motto?"

When the man saw it, he couldn't help laughing and thanking him again and again. The six words were rearranged, which turned out to be: "Don't be careless."